Another good thing to remember is this, and I'm pretty sure this is accurate: the main way to catch it is through ingesting it. (I'm thinking ingesting might even be the only way to catch) So if you wash your hands before putting them in your mouth, you probably won't get it. It has been 7 1/2 years since anyone in my family (parents, myself, and brothers included) got a norovirus and before that it had been over twenty years for both of my parents. They are very, very, very, very clean, too.